CN106811186A - A kind of acidification blocking remover - Google Patents
A kind of acidification blocking remover Download PDFInfo
- Publication number
- CN106811186A CN106811186A CN201710020278.9A CN201710020278A CN106811186A CN 106811186 A CN106811186 A CN 106811186A CN 201710020278 A CN201710020278 A CN 201710020278A CN 106811186 A CN106811186 A CN 106811186A
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- China
- Prior art keywords
- acid
- agent
- blocking remover
- acidification blocking
- acidification
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The present invention relates to a kind of acidification blocking remover.Mainly solve the problems, such as that existing de-plugging agent is poor for area acid treatment of oil formation effect farther out.The acidification blocking remover, its component and proportioning are as follows by weight percentage:Inorganic acid 1 30%, organic acid 0.5 2.0%, complexing agent 0.5 2.0%, detergent 0.5 1.5%, corrosion inhibiter 0.5 1.5%, clay stabilizer 1 3%, demulsifier 0.3 0.5%, bleeding agent 0.3 0.5%, mutual solvent 0.3% 2%, surfactant 0.1 0.5%, balance of water.The acidification blocking remover is long for the area acid treatment of oil formation term of validity farther out, acidifying plugging removal effect is good.
Description
Technical field
The present invention relates to a kind of inorganic agent in oil extraction in oil field technical field, especially a kind of acidification blocking remover and its preparation side
Method.
Background technology
Can be because a variety of causes in production process causes oil layer blocking, under causing permeability in the oil extraction process
Drop, yield decline.In order to ensure the normal exploitation in oil field, recover or increase the permeability on stratum, realize oil-water well volume increase and increase
Note, it is necessary to which the contamination and plugging to oil reservoir carries out de-plugging, releases the blocking of oil reservoir, improves reservoir permeability.
It is hydrochloric acid and mud acid that conventional acidulation block releasing technique is relied primarily on(Hydrochloric acid, hydrofluoric acid are formulated mixed by a certain percentage
Close liquid)Acidification stratum, fast to reservoir rock corrosion speed, sour depletion rate is fast, but can only be acidified near wellbore zone and imitated
Really good, treatment radius are small, can only release the pollution of near wellbore zone, and the oil layer pollution that can not release area farther out is blocked, acidifying
Effect is poor, is also easy to produce the new pollution such as secondary precipitation, and the term of validity is short.
The content of the invention
The invention reside in overcoming existing de-plugging agent present in background technology poor for area acid treatment of oil formation effect farther out
Problem, and a kind of acidification blocking remover is provided.The acidification blocking remover, acidifying de-plugging long for the area acid treatment of oil formation term of validity farther out
Effect is good.
The present invention solves its problem can be reached by following technical solution:The acidification blocking remover, its component and proportioning are pressed
Percentage by weight is as follows:Inorganic acid 1-30%, organic acid 0.5-2.0%, complexing agent 0.5-2.0%, detergent 0.5-1.5%, inhibition
Live on agent 0.5-1.5%, clay stabilizer 1-3%, demulsifier 0.3-0.5%, bleeding agent 0.3-0.5%, mutual solvent 0.3%-2%, surface
Property agent 0.1-0.5%, balance of water.
The inorganic acid is one or more mixture in hydrochloric acid, hydrofluoric acid, nitric acid powder;Organic acid is in acetic acid, citric acid
One or two mixtures;Complexing agent is ethanedioic acid tetraacethyl disodium;Corrosion inhibiter is YXH-1 type corrosion inhibiter, it is adaptable to hydrochloric acid, soil
Acid, nitric acid, acetic acid, citric acid;Demulsifier is SP-169 type demulsifiers, i.e. octadecanol PEO polyethenoxy ether;Wash
Finish is TCZ-1 detergents;Mutual solvent is butyl glycol ether and methyl alcohol;Surfactant is fluorocarbon surfactant;Bleeding agent
It is JFC type bleeding agents, i.e. C7~C9Mixed fatty alcohol PEO ether.
The preparation method of acidification blocking remover:Various inorganic acids, organic acid, complexing agent, inhibition are sequentially added in water first
Agent, clay stabilizer, demulsifier;Add detergent, bleeding agent, mutual solvent successively after stirring;It is eventually adding surfactant
This product is obtained.
The acidification blocking remover, nitric acid, organic acid, bleeding agent, detergent are increased than conventional acidification blocking remover, are used to carry
The dissolution rate of dirt high and formation blockage thing, does not produce secondary precipitation;Adding surfactant, bleeding agent can increase the effective of acid solution
Operating distance, realizes the purpose of earth formation deep acidifying;Reaction speed is reduced, to extend the effective reaction time of acid, increases work(
Effect;The wetability of rock and acid solution contact surface can be adjusted by reducing the surface tension between acid solution and rock, can be effectively
Realize the row of returning of residual acid solution;Adding breaker component can prevent from being blocked because de-plugging agent mixes the emulsion for producing with formation fluid
Stratum, can reduce and return exclusion power;Product itself has the effect of stabilizer, can effectively prevent the product of indissoluble hydroxide
It is raw, it is to avoid to cause new pollution and blocking;The complexing energy that the complexing agent of addition, organic acid have to polyvalent metal ion in solution
Power, has very strong adsorption capacity to all polycations, can suppress sandstone acidizing secondary precipitation;Add the inhibition for various acid
Agent, it has good corrosion inhibiting ability, and corrosion rate can under 90 DEG C, normal pressure, N80 steel discs, the strict test condition such as 4 hours
Reach 2g/m2Below h, much smaller than 8g/m2•h(Oil and Natural Gas Corporation's professional standard).The oil-water well that acid solution can be reduced sets
Standby corrosion.
It is of the invention to be had the advantages that compared with above-mentioned background technology:The acidification blocking remover, for stratum and
Formation blockage thing has stronger solvability, and can carry out deep formation acidifying.The product does not destroy formation skeleton, will not be right
Secondary pollution is caused on stratum, with Low Damage, improve oil reservoir percolation ability the characteristics of.The acidifying term of validity is long, acidifying de-plugging effect
It is really good.Can be used for bring in a well de-plugging, old well blowdown de-plugging.The acidification blocking remover increased permeability, improve tar productivity and
Water injection rate.
Specific embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1:
Hydrochloric acid 100g, hydrofluoric acid 25g, nitric acid powder 10g, acetic acid 5g, citric acid 5g, second two are sequentially added in 316g water first
Ammonium tetraacethyl disodium 2.5g, corrosion inhibiter 5g, clay stabilizer 5g, SP-169 demulsifier 2.5g, wash after stirring plus successively
Finish 7.5g, JFC bleeding agent 2.5g, butyl glycol ether 2.5g, methyl alcohol 10g, are eventually adding non-ion fluorin carbon surface active agent
1.5g, is obtained acidification blocking remover product 500g.Test surfaces tension force:17mN/m, demulsification efficiency:94%, corrosion rate:0.98 g/
m2·h。
Embodiment 2:
Hydrochloric acid 125g, hydrofluoric acid 35g, nitric acid powder 15g, acetic acid 5g, citric acid 5g, second two are sequentially added in 275g water first
Ammonium tetraacethyl disodium 2.5g, corrosion inhibiter 6g, clay stabilizer 5g, SP-169 demulsifier 2.5g, wash after stirring plus successively
Finish 7.5g, JFC bleeding agent 2.5g, butyl glycol ether 2.5g, methyl alcohol 10g, are eventually adding non-ion fluorin carbon surface active agent
1.5g, is obtained acidification blocking remover product 500g.Test surfaces tension force:17mN/m, demulsification efficiency:95%, corrosion rate:1.2 g/
m2·h。
Corrosion inhibiter used by embodiment is the model YXH-1 inhibitions of Shandong Binzhou Yu Cheng Chemical Industry Science Co., Ltd production
Agent;Detergent is the model TCZ-1 detergents of Shandong Binzhou Yu Cheng Chemical Industry Science Co., Ltd production;JFC bleeding agents are Shen
Yang Mingyang anti-corrosions research institute produces.
Acidification blocking remover prepared by above-described embodiment 1-2 measures that indices are visible, and surface tension is low:Add surface-active
Agent, bleeding agent increase to the EFFECTIVE RANGE of acid solution, are capable of achieving the purpose of earth formation deep acidifying;Acid liquid reaction speed can be reduced
Degree, to extend the effective reaction time of acid, increases effect;Can also be adjusted by reducing the surface tension between acid solution and rock
Whole rock and the wetability of acid solution contact surface, can effectively realize the row of returning of residual acid solution;Demulsification efficiency is high:Addition breaker component can
Prevent from blocking stratum because de-plugging agent mixes the emulsion for producing with formation fluid, can reduce and return exclusion power;Corrosion rate is small:Can
To reduce corrosion of the acidification blocking remover to oil-water well equipment.Acidification blocking remover prepared by the embodiment measures indices and meets
Evaluation index., well below evaluation index, demulsification efficiency is far above evaluation index for surface tension and corrosion rate.The acidifying de-plugging
The evaluation index of agent each project is shown in Table 1.
The acidifying of table 1 evaluation index of de-plugging agent projects
Project | Index |
Surface tension, mN/m≤ | 30 |
5 | |
Demulsification efficiency, % >= | 90 |
Claims (2)
1. a kind of acidification blocking remover, it is characterised in that:Its component and proportioning are as follows by weight percentage:Inorganic acid 1-30%, it is organic
Sour 0.5-2.0%, complexing agent 0.5-2.0%, detergent 0.5-1.5%, corrosion inhibiter 0.5-1.5%, clay stabilizer 1-3%, demulsification
Agent 0.3-0.5%, bleeding agent 0.3-0.5%, mutual solvent 0.3%-2%, surfactant 0.1-0.5%, balance of water.
2. a kind of acidification blocking remover according to claim 1, it is characterised in that:The inorganic acid is hydrochloric acid, hydrofluoric acid, nitre
One or more mixture in sour powder;Organic acid is one or two mixtures in acetic acid, citric acid;Complexing agent is ethanedioic acid
Tetraacethyl disodium;Corrosion inhibiter is YXH-1 type corrosion inhibiter;Demulsifier is octadecanol PEO polyethenoxy ether;Detergent
It is TCZ-1 detergents;Mutual solvent is butyl glycol ether and methyl alcohol;Surfactant is fluorocarbon surfactant;Bleeding agent is C7
~C9 mixed fatty alcohol PEO ethers.
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108048071A (en) * | 2018-01-12 | 2018-05-18 | 中国海洋石油集团有限公司 | It is a kind of for chemical increasing production liquid of low permeability reservoir and preparation method thereof |
CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
CN109796952A (en) * | 2019-03-28 | 2019-05-24 | 曹高维 | A kind of compound anti-salt production method for salt de-plugging anti-in pit shaft |
CN109913192A (en) * | 2019-04-09 | 2019-06-21 | 天津市擎华能源技术有限责任公司 | Desalination de-plugging agent |
CN110005385A (en) * | 2019-04-09 | 2019-07-12 | 延安顺盈石油工程技术服务有限公司 | A kind of pit shaft and reservoir blockages relieving process |
CN110055043A (en) * | 2019-05-17 | 2019-07-26 | 西安奥德石油工程技术有限责任公司 | Multistage targeting Compound-acid and preparation method thereof |
CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
CN112048292A (en) * | 2020-08-17 | 2020-12-08 | 中海油田服务股份有限公司 | Blockage removing liquid and application thereof |
CN115873572A (en) * | 2022-12-10 | 2023-03-31 | 庆阳华宇石油工程技术有限公司 | Deep penetration cleaning retarding acid deblocking agent and acidification deblocking method |
CN116200178A (en) * | 2023-01-17 | 2023-06-02 | 中国海洋石油集团有限公司 | Reservoir reconstruction liquid and preparation and application thereof |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108048071A (en) * | 2018-01-12 | 2018-05-18 | 中国海洋石油集团有限公司 | It is a kind of for chemical increasing production liquid of low permeability reservoir and preparation method thereof |
CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
CN109796952A (en) * | 2019-03-28 | 2019-05-24 | 曹高维 | A kind of compound anti-salt production method for salt de-plugging anti-in pit shaft |
CN109913192A (en) * | 2019-04-09 | 2019-06-21 | 天津市擎华能源技术有限责任公司 | Desalination de-plugging agent |
CN110005385A (en) * | 2019-04-09 | 2019-07-12 | 延安顺盈石油工程技术服务有限公司 | A kind of pit shaft and reservoir blockages relieving process |
CN110055043A (en) * | 2019-05-17 | 2019-07-26 | 西安奥德石油工程技术有限责任公司 | Multistage targeting Compound-acid and preparation method thereof |
CN110564395A (en) * | 2019-09-30 | 2019-12-13 | 新疆准东准盈技术有限责任公司 | preparation method of blocking remover for oil extraction |
CN112048292A (en) * | 2020-08-17 | 2020-12-08 | 中海油田服务股份有限公司 | Blockage removing liquid and application thereof |
CN112048292B (en) * | 2020-08-17 | 2023-02-28 | 中海油田服务股份有限公司 | Blockage removing liquid and application thereof |
CN115873572A (en) * | 2022-12-10 | 2023-03-31 | 庆阳华宇石油工程技术有限公司 | Deep penetration cleaning retarding acid deblocking agent and acidification deblocking method |
CN116200178A (en) * | 2023-01-17 | 2023-06-02 | 中国海洋石油集团有限公司 | Reservoir reconstruction liquid and preparation and application thereof |
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